Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"hieu co doc snippets" » "hieu co code snippets", "hieu so doc snippets", "hieu bo doc snippets", "hieu ca doc snippets", "hieu co duoc snippets", "hieu co hoc snippets", "hieu co dot snippets"
"python using java snippets" » "python using data snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("hieu co doc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hieu co doc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( hieu co doc snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu co doc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.